Apple revealed the "Works With iPhone" logo for certified iPhone accessories. This logo may be important for you if you shop for iPhone accessories. iPhone is a radio frequency device that may cause interference with other products if not engineered properly. This logo gives you the assurance that iPhone has been tested with the accessory you’re looking at. Speakers systems can be especially fragile to this kind of interference.
When you connect an uncertified accessory, your iPhone will notify you and present you with the option to go into Airplane Mode, which turns off the communication capability of the iPhone while it’s connected to that accessory.
This means that you’ll avoid potential audio interference, but you’ll be unable to make or receive calls. If you choose not to enter Airplane Mode, you can make and receive calls, but you may experience some audio interference.
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